A 32 yo woman suffers an episode of severe occipital headache with vomiting and loss of consciousness

A 32 yo woman suffers an episode of severe occipital headache with vomiting and loss of consciousness. She is brought to the hospital where she is found to be conscious and completely alert. Exam: normal pulse & BP. No abnormal neurological signs. What is the next step in management?

a. Admission for observation
b. CT brain
c. MRI head
d. Reassurance and discharge
e. XR skull